Film composting device and intelligent control method thereof

Abstract

The invention relates to the technical field of film fermentation, and discloses a film composting device and an intelligent control method thereof.The film composting device comprises a first space defined by a bottom plate and a molecular film; the plurality of horizontal aeration pipes and the plurality of vertical aeration pipes are arranged in the first space; the humidity adjusting assembly is arranged outside the first space and is connected to the molecular film and the plurality of horizontal aeration pipes; the plurality of horizontal aeration pipes are arranged in parallel at equal intervals in the length direction of the bottom plate, at least one internal pressure three-way structural member is arranged on the pipe wall, back to the bottom plate, of each horizontal aeration pipe, and at least one vertical aeration pipe is vertically connected to the horizontal aeration pipes through the internal pressure three-way structural members; a plurality of through holes are formed in the pipe walls of each horizontal aeration pipe and each vertical aeration pipe. According to the invention, the three-dimensional aeration structure formed by communicating the horizontal aeration pipe with the vertical aeration pipe is constructed, and the humidity adjusting assembly is cooperatively arranged, so that environmental parameters required by a pile material are finely adjusted and controlled, and the fermentation efficiency and quality are improved.

Description

Technical Field

[0001] This invention relates to the field of membrane fermentation technology, and in particular to a membrane composting device and its intelligent control method. Background Technology

[0002] Composting, as an environmentally friendly and low-cost resource utilization technology for organic waste (such as sludge, livestock and poultry manure, and agricultural waste), is widely used in the field of membrane fermentation. During composting, a sufficient and uniform oxygen supply is crucial for ensuring the normal metabolism of aerobic microorganisms and improving fermentation efficiency.

[0003] However, existing composting systems often employ single-inlet or planar aeration structures, which struggle to evenly distribute air throughout the compost material during operation. Because compost materials typically have significant thickness and dense structure, oxygen diffusion within the material is limited, easily leading to localized anoxic environments. This anoxic condition not only results in the formation of anaerobic byproducts but also inhibits the growth and reproduction of aerobic bacteria, thus prolonging the fermentation cycle, reducing the rate of organic matter degradation, and ultimately hindering the effective improvement of composting efficiency and quality. Summary of the Invention

[0004] This invention provides a membrane composting device and its intelligent control method to solve the technical problem of low fermentation efficiency in the prior art.

[0005] To address the aforementioned technical problems, the present invention provides a membrane composting device, comprising a base plate, a molecular membrane, a plurality of vertical aeration pipes, a plurality of horizontal aeration pipes connected to the base plate, and a humidity regulating component; the space formed by the base plate and the molecular membrane is a first space; the plurality of horizontal aeration pipes and the plurality of vertical aeration pipes are disposed inside the first space; the humidity regulating component is disposed outside the first space and connected to the molecular membrane and the plurality of horizontal aeration pipes; A plurality of horizontal aeration pipes are arranged at equal intervals and parallel to each other along the length of the base plate. Each horizontal aeration pipe has at least one internal pressure tee structure on its pipe wall facing away from the base plate, and at least one vertical aeration pipe is vertically connected to the horizontal aeration pipe through the internal pressure tee structure. Each horizontal aeration pipe and each vertical aeration pipe has a plurality of through holes on its pipe wall.

[0006] In some embodiments, the through holes provided on the horizontal aeration pipe are first through holes; the pore density of the plurality of first through holes ranges from 15 to 20 holes per meter; the pore diameter of the plurality of first through holes ranges from 2 to 4 millimeters; the spacing between adjacent first through holes in the horizontal direction ranges from 50 to 80 millimeters, and the plurality of first through holes are equally spaced along the length direction of the horizontal aeration pipe.

[0007] In some embodiments, the through holes provided on the vertical aeration pipe are second through holes; the pore density of the plurality of second through holes ranges from 15 to 20 holes per meter; the pore diameter of the plurality of second through holes ranges from 2 to 4 millimeters; the plurality of second through holes are arranged at equal intervals along the length direction of the vertical aeration pipe, and the distance between each second through hole in the vertical direction ranges from 30 to 60 millimeters.

[0008] In some embodiments, the opening of the second through hole is tilted towards the top of the vertical aeration pipe, and the tilt angle of the second through hole is in the range of 10-15 degrees.

[0009] In some embodiments, the base plate includes a first base plate with a convex shape at the interface and a second base plate with a concave shape at the interface, wherein the first base plate and the second base plate are detachably connected.

[0010] In some embodiments, a first hook is provided on the end face of the first base plate opposite to the second base plate; a second hook is provided on the end face of the second base plate opposite to the first base plate.

[0011] In some embodiments, a temperature detector and an oxygen detector are provided in the middle of the vertical aeration pipe.

[0012] In some embodiments, the humidity control assembly includes a liquid collection tank, a reflux pump, and a reflux pipe; the liquid collection tank is disposed at one end of the base plate; the inlet end of the reflux pump is connected to the liquid collection tank, and the outlet end of the reflux pump is connected to one end of the reflux pipe; the other end of the reflux pipe is connected to a spray nozzle disposed on the top of the molecular membrane and located inside the first space.

[0013] In some embodiments, the system further includes a variable frequency blower; the variable frequency blower and the main air supply pipe are located at the same end of the base plate; the air outlet of the variable frequency blower is connected to the air inlet of the main air supply pipe, and each air outlet of the main air supply pipe is connected to a plurality of the horizontal aeration pipes.

[0014] The present invention also provides an intelligent control method for a membrane composting device, applied to the membrane composting device in any of the foregoing embodiments, the method comprising: Acquire temperature and oxygen concentration data from temperature and oxygen detectors; Calculate the empirical coefficient based on the preset baseline coefficient, the temperature, and the oxygen concentration; The target ventilation volume is calculated based on the empirical coefficient, the amount of compost material processed in the first space, and the ammonia nitrogen concentration in the compost material. Calculate the target speed based on the target ventilation volume, the rated speed of the variable frequency blower, and the rated air volume; A speed control command is generated based on the target speed, and the speed control command is sent to the variable frequency blower so that the variable frequency blower adjusts its speed according to the speed control command.

[0015] Compared with the prior art, the membrane composting device of this invention has the following advantages: This invention comprises a base plate and a molecular membrane forming a first space for containing compost material. Inside this first space are several horizontal and several vertical aeration pipes. The horizontal aeration pipes are arranged parallel to each other at equal intervals along the length of the base plate. Each horizontal aeration pipe has at least one internal pressure tee structure on its wall facing away from the base plate, and at least one vertical aeration pipe is vertically connected to the horizontal aeration pipe via the internal pressure tee structure. Furthermore, each horizontal and vertical aeration pipe has several through holes on its wall. When the humidity control component, serving as the aeration power source, pumps gas into the horizontal aeration pipes, it not only supplies gas evenly to the bottom and sides of the compost pile through the through holes in the pipe walls, but also guides the airflow without attenuation to the vertical aeration pipes through the internal pressure tee structure, and then transports it to the upper middle part of the compost material through the through holes in the vertical pipe walls, thereby providing a comprehensive oxygen supply environment for the aerobic microorganisms in the compost material. Furthermore, the humidity control component also acts as a liquid regulation circulation loop, working synergistically with the molecular membrane to maintain a stable fermentation environment for the materials in the first space. Thus, by constructing a three-dimensional aeration network connecting horizontal and vertical aeration pipes, and coordinating the humidity control component, the environmental parameters required by the materials in the pile can be precisely controlled, providing conditions for efficient organic matter degradation, thereby improving fermentation efficiency and quality. Attached Figure Description

[0016] Figure 1 This is a side view of the membrane composting device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the main structure of the membrane composting device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the membrane composting device provided in the embodiment of the present invention, in which horizontal aeration pipes and vertical aeration pipes are arranged on the bottom plate; Figure 4 This is a schematic diagram of the structure of the horizontal aeration pipe and the vertical aeration pipe in the membrane composting device provided in the embodiment of the present invention; Figure 5 This is a schematic diagram of another side view of the membrane composting device provided in an embodiment of the present invention; Figure 6 This is a flowchart illustrating the intelligent control method for the membrane composting device provided in an embodiment of the present invention.

[0017] In the diagram, 100 is the base plate; 110 is the first base plate; 111 is the first tow hook; 120 is the second base plate; 121 is the second tow hook; 130 is the geomembrane; 200 is the molecular membrane; 210 is the spray nozzle; 300 is the vertical aeration pipe; 310 is the second through hole; 320 is the temperature detector; 330 is the oxygen detector; 400 is the horizontal aeration pipe; 410 is the first through hole; 420 is the internal pressure tee structure; 500 is the humidity control component; 510 is the liquid collection tank; 520 is the reflux pump; 530 is the reflux pipe; 540 is the variable frequency blower; and 600 is the control terminal. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the directional terms such as "center", "upper", "lower", "inner", and "outer" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature, and in the description of this invention, "at least" means one or more, unless otherwise explicitly specified.

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] See again Figures 1 to 5 This invention provides a membrane composting device, which includes a base plate 100, a molecular membrane 200, a plurality of vertical aeration pipes 300, a plurality of horizontal aeration pipes 400 connected to the base plate 100, and a humidity regulating component 500; the space formed by the base plate 100 and the molecular membrane 200 is a first space; the plurality of horizontal aeration pipes 400 and the plurality of vertical aeration pipes 300 are disposed inside the first space; the humidity regulating component 500 is disposed outside the first space and is connected to the molecular membrane 200 and the plurality of horizontal aeration pipes 400; A plurality of horizontal aeration pipes 400 are arranged at equal intervals and parallel to each other along the length of the base plate 100. Each horizontal aeration pipe 400 has at least one internal pressure tee structure 420 on its pipe wall facing away from the base plate 100, and at least one vertical aeration pipe 300 is vertically connected to the horizontal aeration pipe 400 through the internal pressure tee structure 420. Each horizontal aeration pipe 400 and each vertical aeration pipe 300 has a plurality of through holes on its pipe wall.

[0023] In this embodiment, the compost material is piled within a first space formed by the base plate 100 and the molecular membrane 200. The molecular membrane 200 selectively isolates and facilitates gas exchange within the first space. A humidity control component 500 is located outside the first space and is connected to both the molecular membrane 200 and the horizontal aeration pipe 400. This allows external air to be quantitatively introduced into or expelled from the first space under the action of the humidity control component 500, thereby synergistically regulating the oxygen concentration, temperature, and humidity during the composting fermentation process and avoiding the uneven fermentation problems caused by environmental fluctuations in traditional open-air or static composting.

[0024] Several horizontal aeration pipes 400 are arranged at equal intervals and parallel to each other along the length of the bottom plate 100, allowing air to form a uniformly distributed air supply surface along the bottom of the compost pile. Each horizontal aeration pipe 400 continuously releases oxygen to the bottom of the compost material through several through holes in its pipe wall, thereby providing a stable aerobic environment for the lower layer of the compost pile. At least one vertical aeration pipe 300 is vertically connected to the corresponding horizontal aeration pipe 400 via an internal pressure tee structure 420, allowing the gas introduced by the horizontal aeration pipe 400 to be transported upward under internal pressure and diffused into the middle and upper layers of the compost pile through several through holes in the pipe wall of the vertical aeration pipe 300, achieving stratified oxygen supply in the vertical direction of the compost pile. The internal pressure tee structure 420 enables automatic distribution and redirection of airflow between the horizontal and vertical directions, which helps to reduce local resistance loss, enhance the penetration depth of gas inside the compost pile, and thus reduce anaerobic dead zones inside the compost pile.

[0025] Through the three-dimensional aeration structure formed by the horizontal aeration pipe 400 and the vertical aeration pipe 300, the compost material in the first space can obtain a relatively uniform oxygen supply in both the horizontal and vertical directions, promoting the synchronous decomposition reaction of organic matter by microorganisms throughout the entire compost pile. Combined with the semi-enclosed environment formed by the molecular membrane 200 and the dynamic regulation effect of the humidity regulating component 500, not only can the compost fermentation rate be improved, but the fermentation quality can also be enhanced.

[0026] Specifically, the base plate 100 can be made of stainless steel, and its thickness can be set according to actual needs (e.g., 8-10 mm) to maintain sufficient structural strength and resistance to deformation under the weight of the compost material and the load of turning. Its length and width dimensions are adapted according to the composting volume (e.g., the length of the base plate 100 is set to 4 meters and the width is set to 4 meters) to balance processing efficiency and site utilization.

[0027] The upper surface of the base plate 100 can be evenly distributed with several raised anti-slip textures (not shown in the figure) to increase the friction between the compost material and the base plate 100, reducing slippage of the material during fermentation due to localized settling or airflow disturbance. Four to six adjustable support feet can be welded to the lower surface of the base plate 100, allowing the device to be leveled under different ground conditions, thus avoiding uneven aeration caused by tilting.

[0028] The bottom plate 100 has a side plate vertically arranged on its edge. The inside of the side plate is glued with a corrosion-resistant rubber sealing gasket for sealing with the molecular membrane 200. This arrangement helps to form a stable first spatial boundary, reduce the disorderly infiltration of outside air, and thus improve the controllability of the reactor environment.

[0029] The molecular membrane 200 can be made of polytetrafluoroethylene (PTFE) breathable molecular membrane 200, with the membrane thickness set according to actual needs (e.g., 0.15-0.2 mm), thus ensuring both mechanical strength and good air permeability. Under conditions of 25 degrees Celsius and 101 kPa, its air permeability is 80-120 liters per square meter per minute, and its temperature resistance range is -20℃ to 120℃, thus adapting to the complex conditions of temperature rise and organic acid generation during composting fermentation, extending its service life. The molecular membrane 200 is fixed to the side plate bolts at the edge of the base plate 100 using stainless steel pressure strips to ensure sealing performance. Furthermore, the coverage area of ​​the molecular membrane 200 is 5%-8% larger than the effective area of ​​the base plate 100 to allow for expansion of the compost pile.

[0030] The horizontal aeration pipe 400 can be made of unplasticized polyvinyl chloride (UPVC). The pipe diameter and wall thickness are designed according to actual needs (e.g., pipe diameter of 50-75 mm and pipe wall thickness of 5-8 mm). This material has the advantages of corrosion resistance, light weight and easy processing, and is suitable for long-term burial at the bottom of the pile.

[0031] The bottom plate 100 has several aeration pipe grooves (not shown in the figure) arranged at equal intervals and parallel to each other on the end face of the first space. The horizontal aeration pipe 400 is adapted to the aeration pipe grooves so that it is not easy to move after installation, thereby ensuring the stability of the bottom oxygen supply channel.

[0032] The horizontal aeration pipe 400 is cylindrical, with one end closed and the other end connected to the humidity control component 500. Specifically, its open end is connected to the variable frequency blower 540 in the humidity control component 500 via the main air supply pipe. If necessary, rubber sealing gaskets can be installed at the connection to reduce air leakage and facilitate fine adjustment of the aeration volume through variable frequency control, thereby improving oxygen supply efficiency and reducing energy consumption.

[0033] The internal pressure tee structure 420 (hereinafter referred to as the internal thread tee or tee) is integrally injection molded from acrylonitrile butadiene styrene (ABS) engineering plastic, ensuring both structural strength and good dimensional consistency, which is beneficial for batch installation. This tee structure allows horizontal airflow to be stably converted into vertical airflow under internal pressure, facilitating three-dimensional gas distribution within the reactor body.

[0034] Specifically, the main pipe of the tee is connected to the horizontal aeration pipe 400 using a socket joint, and an internal expansion sealing ring is installed at the connection point to further enhance the sealing performance under airflow pressure and reduce gas leakage at the connection point. The branch pipe of the tee is vertically upward and is connected to the vertical aeration pipe 300 using a threaded connection, with PTFE tape wrapped around the threads for sealing to ensure reliable connectivity of the vertical air delivery channel.

[0035] The vertical aeration pipe 300 is cylindrical and made of steel pipe. Each horizontal aeration pipe 400 has at least one internal pressure tee along its length, and each tee is connected to a vertical aeration pipe 300. Since the number of horizontal aeration pipes 400 is greater than 1, the total number of vertical aeration pipes 300 is also greater than 1, thus forming multiple vertical oxygen supply channels within the pile body.

[0036] The height of the vertical aeration pipe 300 can be set according to actual needs, for example, 1 meter. The top of the vertical aeration pipe 300 is closed, but the bottom is not, allowing gas from the horizontal aeration pipe 400 to smoothly enter the vertical aeration pipe 300 and diffuse upwards. Oxygen is released to the upper layers of the compost pile through the through-holes in the pipe wall of the vertical aeration pipe 300. This structural design helps reduce oxygen dead zones inside the compost pile, ensuring that compost materials at different heights are in a relatively balanced aerobic fermentation environment, thereby improving overall fermentation efficiency and consistency.

[0037] In one embodiment, such as Figure 1 and Figure 4 As shown, the through holes provided on the horizontal aeration pipe 400 are first through holes 410; the pore density of the plurality of first through holes 410 ranges from 15 to 20 pores per meter; the pore diameter of the plurality of first through holes 410 ranges from 2 to 4 millimeters; the spacing between adjacent first through holes 410 in the horizontal direction ranges from 50 to 80 millimeters, and the plurality of first through holes 410 are equally spaced along the length direction of the horizontal aeration pipe 400.

[0038] In this embodiment, a plurality of first through holes 410 are formed along the length of the horizontal aeration pipe 400. Each first through hole 410 is a circular through-hole. The holes can be machined or molded to ensure consistent hole diameter and smooth hole walls. The pore density of the plurality of first through holes 410 ranges from 15 to 20 holes / meter, ensuring that the number of air supply points per unit length matches the oxygen demand of the compost material. This guarantees a sufficient oxygen supply while preventing localized airflow short-circuiting due to excessive number of holes. The pore diameter of the plurality of first through holes 410 ranges from 2 to 4 millimeters, allowing the airflow entering the first space to escape uniformly at a low to medium speed, thereby reducing disturbance to the compost material structure and minimizing concentrated airflow jetting caused by excessively large pore diameters.

[0039] The spacing between two adjacent first through holes 410 in the horizontal direction ranges from 50 to 80 mm, and they are evenly spaced along the length of the horizontal aeration pipe 400. This allows air to be released evenly along the entire length of the horizontal aeration pipe 400, which is beneficial for forming a stable and continuous oxygen supply zone at the bottom of the pile and reducing anaerobic areas caused by insufficient local oxygen supply.

[0040] By synergistically limiting pore density, pore size, and pore spacing, not only can the uniformity of gas distribution within the compost pile be improved, but the energy consumption of the blower can also be reduced while ensuring fermentation efficiency, thereby improving the operational stability and economy of the entire membrane composting unit.

[0041] In one embodiment, such as Figure 1 and Figure 4 As shown, the through holes provided on the vertical aeration pipe 300 are second through holes 310; the pore density of the plurality of second through holes 310 ranges from 15 to 20 holes per meter; the pore diameter of the plurality of second through holes 310 ranges from 2 to 4 millimeters; the plurality of second through holes 310 are arranged at equal intervals along the length direction of the vertical aeration pipe 300, and the distance between each second through hole 310 in the vertical direction ranges from 30 to 60 millimeters.

[0042] In this embodiment, a plurality of second through holes 310 are formed along the axial direction on the wall of the vertical aeration pipe 300. The second through holes 310 are circular through holes and can be formed by mechanical drilling or laser drilling to ensure the consistency of hole diameter and the accuracy of axial distribution. The pore density of the plurality of second through holes 310 ranges from 15 to 20 holes / meter, so that multiple stable vertical oxygen supply and release points are formed within a unit height range, thereby meeting the continuous oxygen demand of compost material at different height layers and avoiding the situation of oxygen enrichment or deficiency only in local heights.

[0043] The aperture of the several second through holes 310 ranges from 2 to 4 mm, ensuring that the gas maintains a suitable flow velocity and diffusion angle when released outward from the vertical aeration pipe 300. This facilitates uniform radial diffusion of the gas in the upper layer of the pile, thereby reducing erosion and disturbance to the pile structure. The several second through holes 310 are arranged at equal intervals along the length of the vertical aeration pipe 300, and the spacing between each second through hole 310 in the vertical direction ranges from 30 to 60 mm. This allows the gas to form a continuous release zone in the vertical direction, thus creating a balanced oxygen supply gradient along the height of the pile.

[0044] By coordinating the pore density, pore diameter, and vertical spacing of the second through hole 310, the vertical aeration pipe 300 can not only effectively transport the gas from the horizontal aeration pipe 400 to the upper part of the pile, but also achieve uniform gas release at different heights. This significantly reduces the anaerobic dead zones inside the pile, promotes the simultaneous aerobic fermentation reaction of microorganisms throughout the entire pile, and thus improves the consistency of fermentation efficiency and compost quality.

[0045] In one embodiment, the opening of the second through hole 310 is tilted towards the top of the vertical aeration pipe 300, and the tilt angle of the opening of the second through hole 310 is in the range of 10-15 degrees.

[0046] In this embodiment, the opening of the second through hole 310 on the wall of the vertical aeration pipe 300 is not arranged in the radial direction, but is inclined upward relative to the radial direction of the vertical aeration pipe 300. The inclined direction of the opening is towards the top of the vertical aeration pipe 300, and the value range of the inclination angle of the second through hole 310 is 10-15 degrees. This inclined structure can be formed in one step by oblique drilling or forming mold to ensure that the inclination angle of each second through hole 310 is consistent.

[0047] By setting the second through-hole 310 as an inclined opening facing the top of the pipe, the gas released from inside the vertical aeration pipe 300 has an upward initial velocity component when it escapes. This makes it easier for the gas to diffuse upward along the height of the pile under the combined effect of gravity and buoyancy, which helps to enhance the coverage of the gas in the upper region of the pile. At the same time, the 10-15 degree inclination angle can avoid excessive gas concentration in the upper part of the pipe, which would lead to uneven local oxygen supply, and can also reduce the risk of structural collapse or pore blockage caused by the airflow directly eroding the compost material.

[0048] In one embodiment, such as Figure 2 and Figure 3 As shown, the base plate 100 includes a first base plate 110 with a convex shape at the interface and a second base plate 120 with a concave shape at the interface, and the first base plate 110 and the second base plate 120 are detachably connected.

[0049] In this embodiment, the base plate 100 includes a first base plate 110 with a convex (U) shaped structure at the interface and a second base plate 120 with a concave (U) shaped structure at the interface. The first base plate 110 and the second base plate 120 are interlocked at the interface to achieve a detachable connection. The convex and concave interfaces form a mutually limiting overlapping structure during assembly, enabling the first base plate 110 and the second base plate 120 to be reliably positioned in both the horizontal and vertical directions.

[0050] Furthermore, the detachable connection method allows the base plate 100 to be disassembled during transportation, installation, and subsequent maintenance, reducing the weight of individual components and the difficulty of installation. When wear or corrosion occurs in a localized area, only the corresponding first base plate 110 or second base plate 120 needs to be replaced, thereby reducing maintenance costs and extending the service life of the entire membrane composting unit.

[0051] In one embodiment, such as Figure 2 and Figure 3 As shown, the first base plate 110 is provided with a first tow hook 111 on the end face opposite to the second base plate 120; the second base plate 120 is provided with a second tow hook 121 on the end face opposite to the first base plate 110.

[0052] In this embodiment, a first tow hook 111 structure is fixedly provided on the end of the first base plate 110 away from the second base plate 120, and a second tow hook 121 structure is correspondingly provided on the end of the second base plate 120 away from the first base plate 110. The first tow hook 111 and the second tow hook 121 serve as force-bearing connection components at both ends of the base plate 100, and their structure can be integrally welded or fixed with high-strength bolts, thereby ensuring sufficient load-bearing capacity during traction or movement.

[0053] By providing tow hooks on the opposite outer end faces of the first base plate 110 and the second base plate 120, the membrane composting device can be quickly connected to the traction equipment whether it is in its entirety or in parts. This facilitates the overall towing or repositioning of the device after composting operations are completed. Simultaneously, this symmetrically arranged tow hook structure ensures that the traction force is evenly distributed along the length of the base plate 100, preventing localized stress concentration that could lead to deformation at the interface of the base plate 100. This improves the device's mobility while ensuring the structural stability of the connection between the first base plate 110 and the second base plate 120.

[0054] Specifically, such as Figure 3 As shown, a geomembrane 130 is provided on the surfaces of the first base plate 110 and the second base plate 120 facing away from the molecular membrane 200, and the geomembrane 130 extends outward and connects to the first tow hook 111 and the second tow hook 121. In this way, by covering the back of the base plate 100 and the tow hook area with the geomembrane 130, the leakage of compost leachate along the joints of the base plate 100 or around the tow hooks can be effectively prevented, thereby protecting the ground environment and maintaining the liquid seal of the first space.

[0055] In one embodiment, such as Figure 1 As shown, a temperature detector 320 and an oxygen detector 330 are provided in the middle of the vertical aeration pipe 300.

[0056] In this embodiment, temperature detector 320 and oxygen detector 330 are positioned in the middle of the vertical aeration pipe to monitor changes in temperature and oxygen concentration of the compost material in the first space in real time. This arrangement reflects the environmental state of the area with high microbial activity at the top of the compost pile, thus providing precise control data for the overall fermentation process. By placing the detectors in the middle of the vertical aeration pipe 300, overheating or localized oxygen deficiency on the surface of the compost pile can be detected early, allowing for timely adjustment of aeration or humidity, thereby improving the uniformity and safety of the compost fermentation.

[0057] In one embodiment, such as Figure 1 As shown, the humidity regulating component 500 includes a liquid collection tank 510, a reflux pump 520, and a reflux pipe 530; the liquid collection tank 510 is disposed at one end of the base plate 100; the inlet end of the reflux pump 520 is connected to the liquid collection tank 510, and the outlet end of the reflux pump 520 is connected to one end of the reflux pipe 530; the other end of the reflux pipe 530 is connected to a spray nozzle 210 disposed on the top of the molecular membrane 200 and located inside the first space.

[0058] In this embodiment, the humidity control component 500 includes a liquid collection tank 510, a reflux pump 520, and a reflux pipe 530. The liquid collection tank 510 is fixedly installed on one end of the base plate 100 and is used to collect liquid generated during composting fermentation or water source for circulating humidification.

[0059] The inlet of the reflux pump 520 is connected to the collection tank 510 to extract liquid from the collection tank 510 and transport it to the reflux pipe 530. The reflux pipe 530 includes a vertical section and a horizontal section vertically connected to the top of the vertical section. The bottom of the vertical section is connected to the outlet of the reflux pump 520. One end of the horizontal section is connected to the top of the vertical section, and the other end is located on the top of the molecular membrane 200 and communicates with the spray nozzle 210 located inside the first space. The spray nozzle 210 can be a uniformly distributed small hole or a multi-point micro-spray structure, so that the reflux liquid can be uniformly distributed above the stack at an appropriate flow rate and in an atomized form.

[0060] With the humidity control component 500, the liquid can circulate from the collection tank 510 back to the top of the compost pile, achieving continuous and controllable humidity replenishment. This prevents the upper layer of the pile from drying out or becoming excessively humid in certain areas, thus maintaining a suitable moisture environment for microbial growth throughout the entire pile. This arrangement also utilizes a combination of gravity and a return pump 520 to improve liquid transport efficiency, reduce energy consumption, and evenly distribute the liquid through the spray nozzles 210, minimizing disturbance to the pile structure, ensuring pile stability and fermentation uniformity, and further enhancing the decomposition rate and product maturity of the compost material.

[0061] Specifically, during the operation of the membrane composting device, the compost material ferments in the first space, continuously producing leachate and liquid formed by the condensation of water vapor. The collection tank 510 is located at one end of the bottom plate 100 and in the lower part of the first space, so that the leachate naturally collects into the collection tank 510 under the action of gravity, thereby achieving centralized collection of the liquid generated by the compost pile and preventing the liquid from stagnating or seeping out of the bottom plate 100 surface.

[0062] The inlet of the reflux pump 520 is connected to the collection tank 510. When the control terminal 600 or the execution body (server) of the intelligent control method of the membrane composting device issues a reflux control command, the reflux pump 520 starts and extracts and pressurizes the liquid collected in the collection tank 510 for transport. The outlet of the reflux pump 520 is connected to one end of the reflux pipe 530, so that the liquid flows stably along the reflux pipe 530 under the action of pumping, realizing reverse transport from bottom to top.

[0063] The other end of the return pipe 530 is connected to a spray nozzle 210 located at the top of the molecular membrane 200 and inside the first space. After the liquid is transported to the spray nozzle 210 through the return pipe 530, it is redistributed in the upper area of ​​the compost material in the form of spraying or atomization. In this way, the recovered leachate can be evenly released on the surface of the compost pile and gradually seep into the interior of the compost pile under gravity and capillary action, thereby replenishing and reusing the moisture of the compost material.

[0064] Through the coordinated action of the collection tank 510, the reflux pump 520, the reflux pipe 530, and the spray nozzle 210, the liquid reflux system constructs a closed-loop reflux path within the first space, consisting of "bottom collection - pumping and conveying - top spraying". This not only effectively prevents leachate discharge from causing environmental pollution, but also maintains a suitable moisture content within the compost pile, promoting continuous activation and uniform fermentation of microorganisms, thereby enhancing the stability of the composting process and the overall fermentation efficiency.

[0065] In one embodiment, such as Figure 1 As shown, it also includes a variable frequency blower 540 and a main air supply pipe (not shown in the figure); the variable frequency blower 540 and the main air supply pipe are located at the same end of the base plate 100; the air outlet of the variable frequency blower 540 is connected to the air inlet of the main air supply pipe, and each air outlet of the main air supply pipe is connected to a plurality of the horizontal aeration pipes 400.

[0066] In this embodiment, the variable frequency blower 540 and the main air supply duct are both located on the same side end of the base plate 100, so as to achieve centralized airflow introduction and compact duct layout in terms of spatial arrangement. The air outlet of the variable frequency blower 540 is connected to the air inlet of the main air supply duct through a sealed interface, so that air can be efficiently and stably delivered from the blower into the main air supply duct.

[0067] The ratio of the number of air outlets in the main air supply duct to the number of horizontal aeration pipes 400 is 1:1. The main air supply duct is arranged along the bottom plate 100, and each of its air outlets is connected to a corresponding number of horizontal aeration pipes 400 to form an integrated horizontal air supply network.

[0068] By centrally locating the variable frequency blower 540 and the main air supply duct on the same end, the air path layout is simplified, reducing pipe bends and connection points, thereby lowering local airflow resistance and improving air supply efficiency. The variable frequency blower 540 can adjust its speed in real time according to the oxygen concentration and temperature within the pile, achieving precise control of airflow and making oxygen delivery in the horizontal aeration pipes 400 more uniform and controllable. Each horizontal aeration pipe 400 receives a stable air source through the main air supply duct, forming a continuous and balanced oxygen supply layer at the bottom of the pile, reducing localized anoxic areas, and improving the aerobic fermentation efficiency and overall fermentation uniformity within the pile. Simultaneously, this centralized arrangement facilitates blower maintenance and pipe repair, reducing operating costs and improving system reliability.

[0069] Specifically, during the operation of the composting unit, the control terminal 600 or the execution entity (server) of the intelligent control method of the membrane composting unit generates a speed control command that matches the oxygen demand state of the compost pile based on the temperature and oxygen concentration information collected by the temperature detector 320 and the oxygen detector 330, and controls the variable frequency blower 540 to operate at the corresponding target speed. After the variable frequency blower 540 starts, it draws in air from the external environment and pressurizes the air under the action of its internal impeller, so that the air obtains stable kinetic energy and pressure potential energy, thereby providing power guarantee for subsequent long-distance transportation and multi-branch distribution. This helps to avoid the problem of local oxygen deficiency in the compost pile due to insufficient air volume.

[0070] The pressurized air enters the main air supply pipe connected to the variable frequency blower 540 through the outlet end. The main air supply pipe, as a primary air distribution channel, gathers and equalizes the airflow from the variable frequency blower 540 along the length of the bottom plate 100, so that the gas maintains a relatively balanced pressure state before entering the multiple horizontal aeration pipes 400, thereby reducing the phenomenon of uneven air supply in each branch and improving the stability of the overall aeration system.

[0071] Each outlet of the main air supply duct is connected to several horizontal aeration pipes 400. Under the action of pressure difference, the gas is diverted from the main air supply duct into the interior of each horizontal aeration pipe 400. Since the several horizontal aeration pipes 400 are equally spaced and parallel to each other along the length of the bottom plate 100, the gas can form a transverse air supply network with a large coverage area in the bottom area of ​​the pile, which is conducive to uniform oxygen supply to the bottom material of the pile and avoids the formation of anaerobic dead zones in the bottom area.

[0072] After the gas enters the horizontal aeration pipe 400, it flows axially along the pipe and is released into the first space through several first through holes 410 set on the pipe wall. The pore density, pore diameter, and equidistant arrangement of the first through holes 410 enable the gas to enter the compost material at a lower flow rate and in a multi-point distribution, thereby reducing the risk of damage to the material structure by local strong winds and improving the uniformity of oxygen diffusion in the compost pile.

[0073] Simultaneously, at least one vertical aeration pipe 300 is vertically connected to a corresponding horizontal aeration pipe 400 via an internal pressure tee structure 420. When gas flows within the horizontal aeration pipe 400, a diversion path is formed at the internal pressure tee structure 420, allowing some gas to enter the vertical aeration pipe 300 under pressure and be transported upwards in a vertical direction. Through this vertical transport method, gas can overcome the limitations of the pile thickness and transport oxygen to the upper and middle regions of the pile, which helps to improve the problem of insufficient upper-layer oxygen supply caused by traditional bottom-only aeration.

[0074] Gas entering the vertical aeration pipe 300 is released step-by-step into the compost material at different heights through the equally spaced second through-holes 310 on the pipe wall. The dense distribution of the second through-holes 310 in the vertical direction allows the gas to diffuse outward at multiple height levels, thus forming a three-dimensional aeration pattern of "bottom horizontal air supply + upper-middle vertical air supplement" in the first space. This significantly improves the penetration depth and uniformity of oxygen distribution throughout the compost pile, thereby effectively enhancing the stability of the aerobic environment inside the pile, promoting microbial activity, and increasing composting fermentation efficiency.

[0075] In another embodiment, such as Figure 5 As shown, the membrane composting device includes, in addition to the base plate 100, molecular membrane 200, several vertical aeration pipes 300, several horizontal aeration pipes 400 and humidity control component 500 shown in the aforementioned embodiment, a control terminal 600; the control terminal 600 is located outside the first space and is electrically connected to the reflux pump 520, variable frequency blower 540, temperature detector 320 and oxygen detector 330 in the humidity control component 500.

[0076] In this embodiment, the control terminal 600 can simultaneously monitor and automatically adjust the air volume output of the reflux pump 520 and the variable frequency blower 540, as well as the temperature and oxygen concentration, to achieve dynamic balance of the composting environment and improve composting fermentation efficiency.

[0077] like Figure 6 As shown, the present invention also provides an intelligent control method for a membrane composting device, applied to the membrane composting device in any of the foregoing embodiments, the method comprising: S1. Acquire the temperature and oxygen concentration collected by the temperature detector 320 and the oxygen detector 330.

[0078] In this embodiment, real-time signals from temperature detector 320 and oxygen detector 330 are received via electrical connection to acquire temperature data and oxygen concentration data of the material at the top of the first space. The temperature detector 320 data reflects the intensity of microbial metabolic activity, while the oxygen detector 330 data reflects the aerobic level of the pile. By simultaneously acquiring these two types of data, accurate perception of the environmental state at the top of the pile can be achieved, helping the control terminal 600 to quickly assess and dynamically adjust the overall environment of the pile, thereby improving fermentation uniformity and efficiency.

[0079] S2. Calculate the empirical coefficient based on the preset baseline coefficient, temperature, and oxygen concentration.

[0080] In this embodiment, the acquired temperature and oxygen concentration data are calculated with preset baseline coefficients to obtain empirical coefficients. The preset baseline coefficients can be set according to the type of compost material, processing volume, and process experience, and are used to standardize and adjust the weights of the sensor data. Calculating the empirical coefficients can transform real-time environmental data into adjustable parameters suitable for the control system, thereby improving the accuracy of the target ventilation calculation and the stability of the system response, and avoiding local overexposure or hypoxia caused by fluctuations in a single parameter. A specific application scenario is used as an example to illustrate the intelligent control method for fermentation using a membrane composting device.

[0081] Specifically, the calculation process of the empirical coefficient can be expressed by the following formula: k = k0 × T / 25 × O2% / 20; where k represents the empirical coefficient; k0 represents the basic coefficient; T represents the temperature; and O2% represents the oxygen concentration.

[0082] S3. Calculate the target ventilation volume based on empirical coefficients, the amount of compost material processed in the first space, and the ammonia nitrogen concentration in the compost material.

[0083] In this embodiment, the target ventilation volume is calculated based on calculated empirical coefficients, combined with the processing volume of compost material in the first space and the ammonia nitrogen concentration in the compost material. The processing volume information is used to determine the overall oxygen demand of the compost pile, while the ammonia nitrogen concentration, as an indicator of microbial metabolic activity and nitrogen volatilization risk, can dynamically adjust the ventilation volume. By simultaneously considering the material volume and ammonia nitrogen concentration, the calculated target ventilation volume can meet the oxygen requirements of different levels of the compost pile, reduce local hypoxia and ammonia nitrogen loss, and improve compost quality and stability.

[0084] Specifically, the formula for calculating the target ventilation volume is: Q = k × M 污泥 ×C NH3 / 39.5; where Q represents the target ventilation volume; k represents the empirical coefficient; M 污泥 Indicates the amount of compost material processed in the first space; C NH3This indicates the concentration of ammonia nitrogen in the compost material.

[0085] It should be noted that nitrogen and oxygen concentrations can be measured using chemical analysis methods, such as spectrophotometry or ion-selective electrode methods; among which, spectrophotometry includes Nessler's reagent method and salicylic acid method.

[0086] S4. Calculate the target speed based on the target ventilation volume, the rated speed of the variable frequency blower, and the rated air volume.

[0087] In this embodiment, the target ventilation volume is calculated by comparing it with the rated air volume and rated speed of the variable frequency blower. Specifically, the calculation process of the target speed can be expressed by the following formula: n2 = n1 × (Q2 / Q1); where n2 represents the target speed; n1 and Q1 represent the rated speed and rated air volume of the variable frequency blower, respectively; and Q2 represents the target ventilation volume.

[0088] This calculation takes into account the blower's characteristic curve, converting the target ventilation volume into the actual operating speed required, enabling the variable frequency blower to avoid overload or excessive energy consumption while ensuring air supply. By accurately calculating the target speed, energy efficiency optimization can be achieved, and a balance can be struck between reactor oxygen supply and blower operating safety, thereby extending equipment life and reducing operating costs.

[0089] S5. Generate a speed control command based on the target speed and send the speed control command to the variable frequency blower so that the variable frequency blower can adjust its speed according to the speed control command.

[0090] In this embodiment, a corresponding speed control command is generated based on the calculated target speed and sent to the variable frequency blower via an electrical connection. Upon receiving the command, the variable frequency blower automatically adjusts the impeller speed according to the set speed, achieving precise control of the airflow within the first space. This real-time, automated speed adjustment not only ensures balanced oxygen supply to each layer of the compost pile, promoting uniform microbial fermentation, but also enables rapid response to environmental changes or load fluctuations, improving the overall intelligence and fermentation efficiency of the composting system while reducing the need for manual intervention and operational risks.

[0091] Taking a specific application scenario as an example, this paper explains the intelligent control method for fermentation using a membrane composting device.

[0092] First, dewatered sludge (approximately 80% moisture content) is mixed with straw, sawdust, and other conditioning agents in a certain ratio (e.g., 3:1:1), and the initial moisture content is adjusted to 55%-65% to obtain compost material. The bottom impermeable membrane 130 is laid on the base plate 100, and the first base plate 110 and the second base plate 120 are spliced ​​and fixed together using tongue-and-groove joints to form a continuous base plate 100. The mixed compost material is then piled into trapezoidal windrows on the base plate 100, with a height of approximately 1.5-2.0 meters, a width of approximately 2-4 meters, and a length determined according to the site conditions.

[0093] Next, the molecular membrane 200 is unfolded and placed over the stack, and the molecular membrane 200 is tightly fixed around the perimeter of the base plate 100 using a clamping device to ensure the airtightness of the first space. The geomembrane 130 extends outward along the back of the base plate 100 and is connected and fixed to the first tow hook 111 and the second tow hook 121 to form a complete bottom seepage protection.

[0094] Then, excess water vapor generated during composting fermentation is discharged through the selectively permeable layer at the top of the molecular membrane 200. During the heating period (when the pile temperature is below 55°C), the variable frequency blower 540 is started. The variable frequency blower 540 operates intermittently at low frequency (e.g., running for 10 minutes and stopping for 50 minutes) to provide suitable oxygen to the pile material and promote the rapid rise in temperature to the high temperature period.

[0095] When temperature detector 320 detects that the temperature of the first compost pile has risen above 55°C, the high-temperature period begins. Based on data from oxygen detector 330, the speed of the variable frequency blower 540 is automatically adjusted. This satisfies the oxygen demand of the high-temperature microorganisms while simultaneously using airflow to remove excess moisture and heat. This maintains the pile temperature within the ideal range of 55-65°C for at least 7 days, achieving the harmless treatment of the compost material.

[0096] During fermentation, the humidity control component 500 circulates the collected leachate from the side end of the bottom plate 100 to the spray nozzle 210 at the top of the molecular membrane 200 through the collection tank 510, the reflux pump 520 and the reflux pipe 530, thereby achieving uniform moisture control of the pile.

[0097] Finally, after about 15-20 days of primary fermentation, the temperature of the compost pile naturally decreases and stabilizes. The molecular membrane is removed 200, and the semi-finished compost is moved to the post-maturation zone for further aging (about 30 days), ultimately yielding a mature, stable, and odorless organic fertilizer product.

[0098] The working process of this invention is as follows: In this embodiment, a first space for containing composting materials is formed by a base plate 100 and a molecular membrane 200. Inside the first space, a plurality of horizontal aeration pipes 400 and a plurality of vertical aeration pipes 300 are arranged. The horizontal aeration pipes 400 are evenly spaced and parallel to each other along the length of the base plate 100. Each horizontal aeration pipe 400 has at least one internal pressure tee structure 420 on its wall facing away from the base plate 100, and at least one vertical aeration pipe 300 is vertically connected to the horizontal aeration pipe 400 through the internal pressure tee structure 420. Simultaneously, a plurality of through holes are provided on the wall of each horizontal aeration pipe 400 and each vertical aeration pipe 300. When the humidity regulating component 500, acting as the aeration power source, pumps gas into the horizontal aeration pipe 400, it not only supplies gas evenly to the bottom and sides of the compost pile through the through-holes in the pipe wall, but also guides the airflow without attenuation to the vertical aeration pipe 300 through the internal pressure tee structure 420. From there, the airflow is transported to the upper and middle parts of the compost material through the through-holes in the vertical pipe wall, thus providing a comprehensive oxygen supply environment for the aerobic microorganisms in the compost material. Furthermore, the humidity regulating component 500 also works synergistically with the molecular membrane 200 as a liquid regulation circulation loop to maintain a stable fermentation environment for the compost material in the first space. In this way, by constructing a three-dimensional aeration network connecting the horizontal aeration pipe 400 and the vertical aeration pipe 300, and by coordinating the humidity regulating component 500, the environmental parameters required by the compost material can be precisely controlled, providing conditions for efficient organic matter degradation and thus improving fermentation efficiency.

[0099] In summary, this invention provides a membrane composting device and its intelligent control method, comprising a base plate 100, a molecular membrane 200, a plurality of vertical aeration pipes 300, a plurality of horizontal aeration pipes 400 connected to the base plate 100, and a humidity regulating component 500; the space formed by the base plate 100 and the molecular membrane 200 is a first space; the plurality of horizontal aeration pipes 400 and the plurality of vertical aeration pipes 300 are disposed inside the first space; the humidity regulating component 500 is disposed outside the first space and connected to the molecular membrane 200. The invention comprises a membrane 200 and a plurality of horizontal aeration pipes 400. The plurality of horizontal aeration pipes 400 are arranged parallel to each other at equal intervals along the length of the base plate 100. Each horizontal aeration pipe 400 has at least one internal pressure tee structure 420 on its wall facing away from the base plate 100, and at least one vertical aeration pipe 300 is vertically connected to the horizontal aeration pipe 400 through the internal pressure tee structure 420. Each horizontal aeration pipe 400 and vertical aeration pipe 300 has a plurality of through holes on its wall. This invention improves fermentation efficiency by constructing a three-dimensional aeration network connecting the horizontal aeration pipes 400 and the vertical aeration pipes 300, and by coordinating with a humidity control component 500, to finely control the environmental parameters required by the material in the compost pile.

[0100] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A membrane composting device, characterized in that, The device includes a base plate, a molecular membrane, several vertical aeration pipes, several horizontal aeration pipes connected to the base plate, and a humidity control component. The space formed by the base plate and the molecular membrane is a first space. The several horizontal aeration pipes and the several vertical aeration pipes are located inside the first space. The humidity control component is located outside the first space and is connected to the molecular membrane and the several horizontal aeration pipes. A plurality of horizontal aeration pipes are arranged at equal intervals and parallel to each other along the length of the base plate. Each horizontal aeration pipe has at least one internal pressure tee structure on its pipe wall facing away from the base plate, and at least one vertical aeration pipe is vertically connected to the horizontal aeration pipe through the internal pressure tee structure. Each horizontal aeration pipe and each vertical aeration pipe has a plurality of through holes on its pipe wall.

2. The membrane composting device according to claim 1, characterized in that, The through holes provided on the horizontal aeration pipe are the first through holes; the pore density of the first through holes ranges from 15 to 20 holes per meter; the pore diameter of the first through holes ranges from 2 to 4 millimeters; the spacing between adjacent first through holes in the horizontal direction ranges from 50 to 80 millimeters, and the first through holes are equally spaced along the length of the horizontal aeration pipe.

3. The membrane composting device according to claim 1, characterized in that, The through holes provided on the vertical aeration pipe are second through holes; the pore density of the second through holes ranges from 15 to 20 holes per meter; the pore diameter of the second through holes ranges from 2 to 4 millimeters; the second through holes are arranged at equal intervals along the length of the vertical aeration pipe, and the distance between each second through hole in the vertical direction ranges from 30 to 60 millimeters.

4. The membrane composting device according to claim 3, characterized in that, The opening of the second through hole is tilted towards the top of the vertical aeration pipe, and the tilt angle of the second through hole is in the range of 10-15 degrees.

5. The membrane composting device according to claim 1, characterized in that, The base plate includes a first base plate with a convex shape at the interface and a second base plate with a concave shape at the interface, and the first base plate and the second base plate are detachably connected.

6. The membrane composting device according to claim 5, characterized in that, A first tow hook is provided on the end face of the first base plate opposite to the second base plate; a second tow hook is provided on the end face of the second base plate opposite to the first base plate.

7. The membrane composting device according to claim 1, characterized in that, A temperature detector and an oxygen detector are installed in the middle of the vertical aeration pipe.

8. The membrane composting device according to claim 1, characterized in that, The humidity control assembly includes a liquid collection tank, a reflux pump, and a reflux pipe; the liquid collection tank is located at one end of the base plate; the inlet end of the reflux pump is connected to the liquid collection tank, and the outlet end of the reflux pump is connected to one end of the reflux pipe; the other end of the reflux pipe is connected to a spray nozzle located at the top of the molecular membrane and inside the first space.

9. The membrane composting device according to claim 8, characterized in that, It also includes a variable frequency blower and a main air supply pipe; the variable frequency blower and the main air supply pipe are located at the same end of the base plate; the air outlet of the variable frequency blower is connected to the air inlet of the main air supply pipe, and each air outlet of the main air supply pipe is connected to a plurality of the horizontal aeration pipes.

10. A smart control method for a membrane composting device, characterized in that, The method, applied to the membrane composting apparatus according to any one of claims 1-9, comprises: Acquire temperature and oxygen concentration data from temperature and oxygen detectors; Calculate the empirical coefficient based on the preset baseline coefficient, the temperature, and the oxygen concentration; The target ventilation volume is calculated based on the empirical coefficient, the amount of compost material processed in the first space, and the ammonia nitrogen concentration in the compost material. Calculate the target speed based on the target ventilation volume, the rated speed of the variable frequency blower, and the rated air volume; A speed control command is generated based on the target speed, and the speed control command is sent to the variable frequency blower so that the variable frequency blower adjusts its speed according to the speed control command.

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